909 vs McIntosh MC7100
The MC7100's power @ 8ω is 100W against the 909's 140W, its power @ 4ω 150W against 225W, its signal-to-noise 95 dB against 108 dB, and its thd 0.005% against 0.010%.
AI-generated product photo — not official manufacturer imagery.
909
QuadAmplifiersPower AmplifiersDiscontinued
Estimated price (community-sourced)
$999
Around — community and catalog average, updates slowly
About the 909
The Quad 909 is a versatile power amplifier designed to work seamlessly with high-quality stereo preamplifiers, particularly those from the Quad 99 series. It features a unique current dumping circuit that combines the sound quality of a low-power class A amplifier with the power delivery of a high-current class B amplifier. This design eliminates issues like crossover distortion and thermal tracking, ensuring consistent performance without the need for fine-tuning adjustments. The amplifier is compact, weighing approximately 12 kg, and is built into a robust casing. It is well-suited for use with speakers like the ESL-63, ESL-988, and ESL-989 but should not be used with earlier ESL models without protection circuits.
Specifications
Power Specifications
Amplification power output and characteristics
- Power @ 8Ω
- 140W @ 8Ω
- Power @ 4Ω
- 225W @ 4Ω
- Amplifier Class
- AB
Analog Output
Analog signal output specifications
- THD
- 0.010%
- SNR
- 108 dB
- Output Voltage
- 0.8V RMS
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 321 × 140 × 240 mm (W × H × D)
- Weight
- 12 kg (26 lbs)
Key Specifications
Power: 140W
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions